Level 3 voice outage

Gareth Tupper Gareth.Tupper at warnerpacific.com
Wed Oct 5 17:10:25 UTC 2016

Looks like a fat finger event...

>From Level 3:
"On October 4, our voice network experienced a service disruption affecting some of our customers in North America due to a configuration error. We know how important these services are to our customers. As an organization, we're putting processes in place to prevent issues like this from recurring in the future. We were able to restore all services by 9:31am Mountain time."


-----Original Message-----
From: NANOG [mailto:nanog-bounces at nanog.org] On Behalf Of Mel Beckman
Sent: Tuesday, October 4, 2016 1:09 PM
To: Marco Teixeira <admin at marcoteixeira.com>
Cc: Shawn Ritchie <shawnritchie at gmail.com>; NANOG list <nanog at nanog.org>
Subject: Re: Level 3 voice outage

Possibly somebody YANGed when they should have yinged :)

 -mel beckman

On Oct 4, 2016, at 1:06 PM, Marco Teixeira <admin at marcoteixeira.com<mailto:admin at marcoteixeira.com>> wrote:

Yeap, i know, it was what i understood, as it is my opinion that a zero day would fit better... in the pure speculation world :) At the end of the day... maybe some undocumented fault int some obscure functionality that was activated/deployed a long time ago, and just revealed it self now... There are so many things that can go wrong on complex networks even with all the controls imposed on changes...

On Tue, Oct 4, 2016 at 8:54 PM, Shawn Ritchie <shawnritchie at gmail.com<mailto:shawnritchie at gmail.com>> wrote:
Well, Level3 has by no means said that this was the result of a DDoS, that's just speculation on behalf of folks who do not work at Level3 so far.

On Tue, Oct 4, 2016 at 2:49 PM Marco Teixeira <admin at marcoteixeira.com<mailto:admin at marcoteixeira.com>> wrote:
I won't believe a company like Level3 would not deploy backplane protection/policing on routers. Also, 1Tb/s aggregated DDoS towards OVH network didn't pause or rebooted routers. And i guess both companies have had their share of (D)DoS in the past, so they had the time to get up to the challenge. Now... there where times where one malformed IP packet would cause a memory leak leading to a router reboot... :)?

On Tue, Oct 4, 2016 at 8:23 PM, Mel Beckman <mel at beckman.org<mailto:mel at beckman.org>> wrote:

> 765 Gbps per second directed at a router's interface IP might give the
> router pause, so to speak :)
>  -mel
> On Oct 4, 2016, at 12:10 PM, Marco Teixeira
> <admin at marcoteixeira.com<mailto:admin at marcoteixeira.com>>
> wrote:
> Multiple reboots across several markets... Does not seem something
> that full pipes would trigger. Had it been an approved chance it would
> have been rolled back i guess... On the other hand, a zero day could apply...
> Em 04/10/2016 19:54, "Mel Beckman" <mel at beckman.org<mailto:mel at beckman.org>> escreveu:
>> Sure. The recent release of the IoT DDoS attack code in the wild.
>>  -mel
>> > On Oct 4, 2016, at 11:42 AM, Valdis.Kletnieks at vt.edu<mailto:Valdis.Kletnieks at vt.edu> wrote:
>> >
>> > On Tue, 04 Oct 2016 18:14:54 -0000, Mel Beckman said:
>> >
>> >> This could be DoS attack.
>> >
>> > Or a missing comma in a code update.
>> >
>> > Or a fumble-fingered NOC monkey.
>> >
>> > Or....
>> >
>> > You have any reason to suspect a DoS attack rather than all the
>> > other possibilities?


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